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<p>A solid electrolyte having the ionic conductivity comparable to that of conventional liquid electrolyte can be used in all-solid-state lithiumion batteries (ASSLIBs). The series Li<sub>6.75+x</sub>La<sub>3-x</sub>Sr<sub>x</sub>Zr<sub>1.75</sub>Ta<sub>0.25</sub>O<sub>12</sub> (<i>x</i> = 0 to 0.20) was synthesized to improve the ionic conductivity of garnet Li<sub>7</sub>La<sub>3</sub>Zr<sub>2</sub>O<sub>12</sub> (LLZO). The structural, physical, and morphological investigations have been carried out for all the synthesized samples using X-ray diffraction, density measurement, and scanning electron microscopy, respectively. The compositional analysis has been done using ICP-OES analysis. The results of electrochemical analysis showed that the maximum room temperature ionic conductivity of 3.5 × 10<sup>−4</sup> S/cm and minimum activation energy of 0.29&#xa0;eV are achieved by the 0.05 Sr ceramic sample sintered at 1050°C. The DC conductivity measurement confirmed the dominance of ionic conduction in the prepared ceramic samples. The highest ionic conductivity with the minimum activation energy makes the 0.05 Sr ceramic sample a suitable choice as solid electrolyte for all-solid-state lithiumion batteries (ASSLIBs).</p>

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Investigation of the doping effects of Sr-Ta on the ionic conductivity of garnet Li7La3Zr2O12 solid electrolyte

  • 期刊论文

  • 发表日期：

    2025年8月19日

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  • Muktai Aote,
  • A. V. Deshpande,
  • Kajal Parchake,
  • Anuj Khapekar

摘要

A solid electrolyte having the ionic conductivity comparable to that of conventional liquid electrolyte can be used in all-solid-state lithiumion batteries (ASSLIBs). The series Li6.75+xLa3-xSrxZr1.75Ta0.25O12 (x = 0 to 0.20) was synthesized to improve the ionic conductivity of garnet Li7La3Zr2O12 (LLZO). The structural, physical, and morphological investigations have been carried out for all the synthesized samples using X-ray diffraction, density measurement, and scanning electron microscopy, respectively. The compositional analysis has been done using ICP-OES analysis. The results of electrochemical analysis showed that the maximum room temperature ionic conductivity of 3.5 × 10−4 S/cm and minimum activation energy of 0.29 eV are achieved by the 0.05 Sr ceramic sample sintered at 1050°C. The DC conductivity measurement confirmed the dominance of ionic conduction in the prepared ceramic samples. The highest ionic conductivity with the minimum activation energy makes the 0.05 Sr ceramic sample a suitable choice as solid electrolyte for all-solid-state lithiumion batteries (ASSLIBs).